	package charts.series ;
	
	/**
	 * anything that wants to use our tooltips
	 * must implement this Interface
	 */
	interface HasTooltip {
		
		// get the tip string
		function get_tooltip():String;
		
		// this should return a Point
		function get_tip_pos():{ x:Float, y:Float };
		
		// if true, show hover state,
		// if false the item should go
		// back to the ground state. Not hovered.
		function set_tip( b:Bool ):Void;
	}
